DeMeGRaS - Detection mechanisms in graphene radiation sensors

​Partners: 

Motivation and plan: 

• Two major detection mechanisms in graphene radiation sensors: (photo)thermoelectric- and plasma (Dyakonov-Shur, DS) mechanisms.

• The same functional form – it is difficult to tell the mechanisms apart in the common geometries.

• One goal is to use unusual device layouts, which favor only one mechanism at a time.

• More clues from the THz ratchet effects and detection measurements in the magnetic field.

• An eye on practical detectors; may be even realize a constructive action of the both mechanisms.

Publications: 

1. A. Yurgens, Large Responsivity of Graphene Radiation Detectors with Thermoelectric Readout:Results of Simulations, Sensors 20, 1930 (2020);DOI: 10.3390/s20071930.
2. S. Hubmann, V. V. Bel’kov, L. E. Golub, V. Y. Kachorovskii, M. Drienovsky, J. Eroms, D. Weiss, and S. D. Ganichev, Giant ratchet magneto-photocurrent ingraphene lateral superlattices, Phys. Rev. Res. 2, 033186 (2020); DOI: 10.1103/PhysRevResearch.2.033186.
3. Y. Matyushkin, S. Danilov, M. Moskotin, V. Belosevich, N. Kaurova, M. Rybin, E. D. Obraztsova, G. Fedorov, I. Gorbenko, V. Kachorovskii, and S. Ganichev, Helicity-Sensitive Plasmonic Terahertz Interferometer​, Nano Lett. 20, 7296 (2020); DOI: 10.1021/acs.nanolett.0c02692.
4. Y. B. Vasiliev, S. N. Novikov, S. N. Danilov, and S. D. Ganichev, Terahertz Photoconductivity inGraphene in a Magnetic Field, Semiconductors 54, 465 (2020).

5. K. A. Baryshnikov, Y. B. Vasilyev, S. Novikov, S. N. Danilov, and S. D. Ganichev, Terahertz photoconductivity enhancement in graphene in magnetic fields​​, J. Phys. Conf. Ser. (Institute of Physics Publishing, 2020), p. 12039; DOI: 10.1088/1742-6596/1482/1/012039